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Posted to dev@phoenix.apache.org by "Gabriel Reid (JIRA)" <ji...@apache.org> on 2014/07/08 07:18:35 UTC

[jira] [Updated] (PHOENIX-539) Implement parallel scanner that does not spool to disk

     [ https://issues.apache.org/jira/browse/PHOENIX-539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gabriel Reid updated PHOENIX-539:
---------------------------------

    Attachment: PHOENIX-539.1.patch

Updated patch with documentation on the spots where ChunkedResultIterator is disabled, as well as a dedicated HashJoinInfo.isHashJoin(Scan) method.

> Implement parallel scanner that does not spool to disk
> ------------------------------------------------------
>
>                 Key: PHOENIX-539
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-539
>             Project: Phoenix
>          Issue Type: Task
>            Reporter: James Taylor
>            Assignee: larsh
>         Attachments: PHOENIX-539.1.patch, PHOENIX-539.patch
>
>
> In scenarios where a LIMIT is not present on a non aggregate query that will return a lot of results, Phoenix spools the results to disk. This is less than ideal in these situations. @larsh has created a very good and relatively simple implementation that is queue based to replace this.



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